The XB-70 Valkyrie was an aircraft ahead of its time. Equipped with drooping wingtips, and designed with one of the highest lift-to-drag ratios in aviation hist

The XB-70 Valkyrie was an aircraft ahead of its time that challenged the known concepts of the flight envelope. Originally printed by NASA and the Air Force, th

Of the many futuristic military aircraft concepts created in the 1950s the North American XB-70 still stands out as the most awe-inspiring. With its huge, white

Often lost in the shadow of the first group of astronauts for the Mercury missions, the second and third groups included the leading figures for NASA's activiti